2026 ICD-10-CM Diagnosis Code H00.036Abscess of eyelid left eye, unspecified eyelid

ICD-10-CM Codes›H00–H59›H00-H05›H00

ICD-10-CM H00.036
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

H00.036 is a billable ICD-10-CM diagnosis code for abscess of eyelid left eye, unspecified eyelid. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. Coders also document this condition as abscess of eyelid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease and Oculofacial plastics and orbital conditions.

Code Identity

ICD-10-CM Code
H00.036
Billable Status
Yes — Valid for Submission
Code Describes
Abscess of eyelid left eye, unspecified eyelid
Short Description
Abscess of eyelid left eye, unspecified eyelid
Same as the full description in the CMS dataset.
Parent Code
H00.03
Abscess of eyelid

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH00-H05Disorders of eyelid, lacrimal system and orbit
CategoryH00Hordeolum and chalazion
This CodeH00.036Abscess of eyelid left eye, unspecified eyelid

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of eyelid
  • Abscess of left eyelid
  • Cellulitis of eyelid
  • Cellulitis of left eyelid

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE001
Cornea and external disease
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR EYE008
Oculofacial plastics and orbital conditions
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H00.036 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
373.13 Abscess of eyelid
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About H00.036Overview

Is H00.036 (Abscess of eyelid) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abscess of eyelid left eye, unspecified eyelid on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does H00.036 group to?

When abscess of eyelid left eye, unspecified eyelid is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of H00.036?

Under the General Equivalence Mappings, abscess of eyelid left eye, unspecified eyelid converts to ICD-9-CM 373.13 (abscess of eyelid). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.